PubMed is a search engine that searches for and retrieves information from MEDLINE. MEDLINE is a database of bibliographic records that is compiled and maintained by the United States National Library of Medicine (NLM). A bibliographic record of an information source (such as a book or an article), contains descriptive information about that source, such as the names of its author(s), its title, and year and place of publication. The MEDLINE database houses a huge number of bibliographic records for information sources in medicine, nursing, pharmacy, dentistry, veterinary medicine, health care, the biomedical sciences and related subject areas. New entries are indexed (tagged) and added to MEDLINE daily.
Note that MEDLINE indexes bibliographic records not full text articles. The School of Public Health (SPH) and the Texas Medical Center (TMC) libraries subscribe to many of the public-health related journals that you might need for your research. Therefore, in order to obtain the full texts of the articles that you locate during your search in PubMed, you must access PubMed through either the SPH or the TMC library websites.